Wells–Dawson heteropoly acid encapsulated into the nanocages of SBA-16 as heterogeneous catalyst for the oxidation of olefins and alcohols

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• 作者：M. Masteri-Farahani ; Gh. R. Najafi ; M. Modarres…
• 关键词：SBA ; 16 ; Polyoxometalate ; Wells–Dawson ; Encapsulation ; Oxidation
• 刊名：Journal of Porous Materials
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：23
• 期：1
• 页码：285-290
• 全文大小：905 KB
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• 作者单位：M. Masteri-Farahani (1)
  Gh. R. Najafi (2)
  M. Modarres (1)
  M. Taghvai-Nakhjiri (2)
  
  1. Faculty of Chemistry, Kharazmi University, Tehran, Iran
  2. Department of Chemistry, Qom Branch, Islamic Azad University, Qom, Iran
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Catalysis
  Characterization and Evaluation Materials
  Physical Chemistry
  
• 出版者：Springer Netherlands
• ISSN：1573-4854

文摘

Wells–Dawson type 18-tungstophosphoric acid (H₆P₂W₁₈O₆₂) as guest was encapsulated inside the nanocages of mesoporous SBA-16 host. The pore entrance of SBA-16 material was modified by silylating reagent to prevent the escape of encapsulated H₆P₂W₁₈O₆₂ from the nanocages. The prepared host–guest material was characterized by different physicochemical techniques. X-ray diffraction and transmission electron microscopy analyses indicated the retention of mesoporous structure of SBA-16 and well-dispersion of the H₆P₂W₁₈O₆₂ into the nanocages of SBA-16. The obtained material exhibited high catalytic activity, stability, and recyclability in the epoxidation of olefins and oxidation of alcohols in the presence of H₂O₂ as oxidant. Keywords SBA-16 Polyoxometalate Wells–Dawson Encapsulation Oxidation